Chloride ion battery

A chloride ion, battery technology, applied in secondary batteries, circuits, electrical components, etc., can solve the problems of poor safety and high price of metal lithium, and achieve the effect of low price and large reserves

Inactive Publication Date: 2014-12-24
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Zhao et al proposed the innovative concept of using metal oxychlorides as cathode materials for chloride ion batteries in the journal Angewandte Chemie International Edition, Volume 52, Issue 51, entitled "Metal oxychlorides as cathode materials for chloride ion batteries", which solved the above-mentioned desorption problem. However, the negative electrode material in this report is still metal lithium, the price is high, and the safety of metal lithium is poor

Method used

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Examples

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Comparison scheme
Effect test

Embodiment 1

[0031] 1), battery assembly: put commercially available magnesium powder (99.6%, Alfa Aesar) and 20% by weight of carbon black into a sealed ball mill jar protected by argon, and ball mill for 20 hours at a speed of 200 rpm. The ratio was 10:1, and the Mg / C composite material (M1) was prepared, and then 14 mg of the powder was weighed and cold-pressed into a thin sheet with a diameter of 11 mm and a thickness of about 0.1 mm, as a negative electrode. at 0.6M PP 14 Cl / PP 14 The TFSI mixed ionic liquid is used as the electrolyte, and the BiOCl / C (10% carbon content) composite material is used as the positive electrode material.

[0032] 2), the results of charge and discharge experiments show that (such as figure 1 As shown), the first discharge capacity of the BiOCl positive electrode material is 102mAh / g, reaching 99% of the theoretical capacity, the subsequent charge capacity is 68%, and the Coulombic efficiency is 68%. After the first activation, the battery discharge pla...

Embodiment 2

[0034] 1), battery assembly: put commercially available magnesium hydride powder and carbon black into a sealed ball mill tank protected by argon, and ball mill for 50 hours at a speed of 200 rpm with a ball-to-material ratio of 40:1 to obtain MgH 2 / C composite material, and then under vacuum conditions, the Mg / C composite material (M2, carbon content 40%) was obtained through 400 ° C for 12 hours. Weighed 14 mg of the powder and cold-pressed it into a diameter of 11 mm and a thickness of about 0.1 mm. slices as the negative electrode. at 0.5MPP 14 Cl / PP 14 The TFSI mixed ionic liquid is the electrolyte, and the BiOCl / C (40% carbon content) composite material is used as the positive electrode material.

[0035] 2), the results of charge and discharge experiments show that (such as figure 1 As shown), the Mg / C composite material (M2) prepared by the thermal decomposition method can effectively improve the charge-discharge Coulombic efficiency of the BiOCl positive electrode...

Embodiment 3

[0037] 1), battery assembly: put commercially available magnesium powder (99.6%, Alfa Aesar) and graphene of 5% by weight into an argon-protected sealed ball mill tank, and ball mill it for 10 hours at a speed of 250 rpm. The ratio is 20:1, and the Mg / C composite material (M1) is obtained; or the commercially available magnesium hydride powder (98%, Alfa Aesar) and graphene are packed in the sealed ball mill jar of argon protection, at 500 rpm Ball milling for 25 hours at a rotating speed of 40:1 to obtain MgH 2 / C composite material, and then under vacuum conditions, the Mg / C composite material (M2, containing 20% ​​carbon) was obtained by heat preservation at 330° C. for 28 hours. Weighed 14 mg of the powder and cold-pressed it into a thin sheet with a diameter of 11 mm and a thickness of about 0.1 mm, which was used as a negative electrode. at 0.5M PP 14 Cl / PP 14 The TFSI mixed ionic liquid is the electrolyte, and the FeOCl / C (containing 25% carbon) composite material is...

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Abstract

The invention provides a chloride ion battery. A magnesium-carbon (Mg / C) composite material which is low in price, large in storage capacity and capable of realizing multi-electron reaction is used as a cathode material and includes an Mg / C material which is prepared by ball milling magnesium powder and carbon powder and an Mg / C material which is prepared by thermally decomposing MgH2 / C material. A composite material of one out of bismuth oxychloride (BiOCl) and chloride ferric oxide (FeOCl) or dichloro vanadium oxide (VOCl2) and carbon is used as an anode material; a mixed ion solution of N-methyl-N-butyl piperidine bi(trifluoromethyl sulfonyl) imine (PP14TFSI) and N-methyl-N-butyl piperidine chloride (PP14Cl) is used as electrolyte. A novel chloride ion battery electrode system adopting the magnesium as the negative electrode is established.

Description

technical field [0001] The invention belongs to the field of energy, and relates to a chloride ion battery. Background technique [0002] With high energy density and a mature market, lithium-ion batteries are playing an increasingly important role in energy storage. The increasing demand for electric vehicles and the storage of renewable energy sources such as solar and wind energy places higher demands on the energy density of batteries. Li-S and Li-O 2 Batteries have attracted great attention because of their high capacity and abundant, low-cost cathode material resources. The battery system using resource-rich Na or Mg as the negative electrode has also been continuously developed. This type of battery is based on Na + or Mg 2+ Cations act as mass transfer ions. Recently, related studies have reported fluoride-ion batteries and chloride-ion batteries based on anion conduction. The reaction equation of this type of battery can be expressed as follows: [0003] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/36
CPCH01M10/36Y02E60/10
Inventor 赵相玉高平沈晓冬
Owner NANJING UNIV OF TECH
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